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Jose M. Calderon Moreno,Monica Popa,Steliana Ivanescu,Cora Vasilescu,Silviu Iulian Drob,Elena Ionela Neacsu,Mihai V. Popa 대한금속·재료학회 2014 METALS AND MATERIALS International Vol.20 No.1
The corrosion behavior of a new, advanced Ti-20Zr alloy with α+β microstructure (determined by opticalmicroscopy, XRD, and SEM) and very good mechanical properties (obtained from the stress-strain curve)is studied in this paper. The composition of the alloy native passive film was determined from a XPS analy-sis and the long-term corrosion resistance in undoped and doped states with 0.05M NaF artificial Carter-Brugi-rard saliva of different pH values, simulating the severe functional conditions of a dental implant, was analyzed byelectrochemical methods. This alloy possesses an advantageous balance between good mechanical resis-tance and plasticity and Young’s modulus and exhibits more favorable electrochemical parameters and cor-rosion resistance than CP Ti due to its more resistant passive layer containing Ti2O3, TiO2, and ZrO2 protectiveoxides. After 1000 h of immersion in saliva, the protective properties of the alloy were enhanced due tothe deposited surface layer that incorporated protective phosphates (shown by SEM and XPS).